Procedures and Policy Extracts and FAQ on Certification of ...

Annexure to Letter No.: CEMILAC/TC&PI/PIC Dated 05th

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Framework Outlines policy level aspects towards ensuring Airworhtiness of Military Air Systems and Airborne Stores Defines roles, responsibilites and empowerment of all stakeholders in Indian Military Airworthiness Framework

Regulations (IMTAR-21) Outline procedural aspects towards achieving Military Airworthiness Certificaiton in India Define Technical Airworthiness Requirments and associated Acceptable Means of Compliance & Guidance Material

Manuals Define Airworthiness Certificaiton Criteria based on tailored standards Provide Templates, Forms, Directives etc. to facilitate effective implementation of Framework and Regulations

Procedures and Policy Extracts and FAQ on Certification of

Airborne Spares as per new DDPMAS Reference: Query from Air Headquarters on “Uploading of Procedures and Policies for

Certification of Airborne Stores” vide letter No.: AirHQ/93822/11/Indg dated 21 May 21.

Introduction to DDPMAS

Comprehensive policy on all aspects of Airworthiness Certification elaborating

certification procedures is brought out by CEMILAC in the revised document “Design,

Development, Production and Certification of Military Air Systems and Airborne Stores

(DDPMAS)”released by Ministry of Defence, as a three-layered document.

The first layer on “Framework and Procedures” consists two parts elaborating on „Part 1:

Airworthiness Management Framework’ and ‘Part 2: Procedure for Design,

Development, Production and Certification of Military Air Systems and Airborne Stores’.

The second layer details the regulation aspects, titled “Indian Military Technical Airworthiness

Requirements (IMTAR-21)” consists of various subparts dealing with a particular topic in

certification and in each subpart is organized with Rationale, Contents, Regulation, Acceptable

Means of Compliance and Guidance Materials. The third layer on “Manuals” consists of

working documents like formats and templates, required by the certification seeking agencies

to initiate the process.


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Development of Airborne Stores and Certification Aspects

Part1 of IMTAR titled “General Procedure for Indian Military Airworthiness” elaborates on

various introductory aspects of Airworthiness Certification, particularly Section 2.5, “Indigenous

substitution”(Pg 11) are described in detail and the extract is reproduced below. This subpart

also brings out which agencies can take up indigenization activities.

IMTAR-21 Design, Development, Production and Certification

of Military Air Systems and Airborne Stores

Subpart A: General Procedure for Indian Military Airworthiness

Para 2.5 Indigenous substitutions (Pg 11& 12):

Indigenous substitution mainly deals with development, prototyping, testing,

evaluation and clearance of an Airborne Store as a replacement of the

existing Airborne Stores procured from foreign sources. The indigenous

substitution can be undertaken by any agency i.e. Public Sector, Private

Sector, Government Agencies or organizations within User Services such as

Base Repair Depots (BRDs), Naval Aircraft Yards (NAYs), Army Base

Workshops etc. In cases where, some of these activities are achieved by way

of subcontracting to suitable vendors, the Indigenisation agency shall ensure

that the vendors comply with the airworthiness certification requirements. The

Local Type Certification Committee (LTCC) shall be constituted on the

Indigenisation agency. LTCC is the authority to assess & classify the

criticality of the airborne stores to be indigenously substituted. Airborne store,

whose malfunctioning may affect safety, reliability, maintenance,

interchangeability and operational effectiveness, is called as a critical

Airborne Store. Airborne store, which is not classified as critical, is treated as

non-critical. The Airborne Stores, identified to be critical, CEMILAC shall

progress the airworthiness certification activities leading to clearance as per

the requirements for abinitio development of airborne stores as given in

Subpart C. The airborne stores, identified to be non-critical the airworthiness

certification coverage leading to its clearance is by the LTCC itself.

For the non-critical store, the Indigenisation agency shall put up the detailed

plan for Indigenisation including technical specification, development and test

plan to the LTCC for review and ratification. Qualification tests shall be

carried out at NABL/ Govt. approved test houses / Laboratories. Quality

Assurance aspects during production shall be ensured by the internal QA of

the Indigenisation agency. On completion of the activities, the indigenization

agency shall submit the test reports and compliance to LTCC for clearance.

The detailed procedures for development, prototyping, testing, evaluation,

approval and production of items being used as indigenous substitutions are

given in Subpart K. Figure A.5 illustrates the schematics for indigenous

substitution.


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Indigenous Substitution of Airborne Stores

Further, Chapter 12 of Part 2 of of Framework layer titled “Indigenous Substitution of Airborne

Stores” details the broad aspects of procedures involved along with the responsibilities of

indigenisation agency. Some relevant extract is reproduced hereunder:

a) Indigenous Substitution mainly deals with development, prototyping, testing,

evaluation and clearance of an Airborne Stores/TTGE as a replacement of the

existing Airborne Stores/TTGE procured from foreign sources.

b) Substitution of an indigenously developed Airborne Store with another indigenous

Airborne Store shall be treated as an ab-initio development and handled in

accordance with the procedure provisions given in Part-2, Chapter 1 on ab-initio

developed Airborne Stores.

c) For the purpose of indigenous substitution, subassemblies also shall be treated as

an Airborne Store and shall be handled using these procedure provisions.

d) Indigenisation of complete Air Systems shall be treated as an ab-initio

development and handled in accordance with the provisions provided in Part-2,

Chapter 1.

Local Type Certification Committee (LTCC) shall be constituted by CEMILAC for the

Indigenization Agency. The LTCC shall have relevant stakeholders to assess & categorize the

criticality of the Airborne Store to be indigenized. The LTCC shall classify Airborne Stores as

Critical and Non-Critical as per the following:

Critical: Airborne store, whose malfunctioning may affect safety, reliability,

maintenance, interchangeability and operational effectiveness is called as a Critical

Airborne Store.

Non-Critical: All other Airborne stores, which are not classified as critical, is treated as

non-critical.

All certification aspects of Non-critical spares are dealt locally by RCMA through aforum called

Local Type Certification Committee (LTCC). The LTCC is a committee to technically discuss

the indigenization aspects of the identified Airborne Stores to be indigenized.


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Flowchart titled “LTCC for Criticality Classification” is given as Fig A5, Pg 24 of Subpart A,

„General Procedure for Indian Military Airworthiness’ of IMTAR.

LTCC Flowchart


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The Airborne Stores, identified to be critical, CEMILAC shall progress the airworthiness

certification activities leading to clearance as per the requirements for abinitio

development of airborne stores as given in Subpart C (see below).


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The airborne stores, identified to be non-critical the airworthiness certification coverage

leading to its clearance is by the LTCC itself. For the non-critical store, the

indigenisation agency shall put up the detailed plan for indigenisation including technical

specification, development and test plan to the LTCC for review and ratification.


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Subpart K of IMTAR 21 is on ‘Indigenous Substitution of Airborne Stores’. This

section gives detailed procedures for development, prototyping, testing, evaluation,

approval and production of such items being used as indigenous substitutions. The

indigenous substitution can be undertaken by any agency i.e. Public Sector, Private

Sector, Government Agencies, or organisations within User Services such as Base

Repair Depots (BRDs), Naval Aircraft Yards (NAYs), Army Base Workshops etc. (See

below).


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FAQ on Certification of Indigenous Airborne Spares

Relevant Sections of new DDPMAS

Chapter 12, “Indigenous Substitution of Airborne Stores”, Framework and Procedure for

Design, Development and Production of Military Air Systems and Airborne Stores

(DDPMAS) Version 1.0

SubpartK, “Indigenous Substitutions of Airborne Stores”, DDPMAS, IMTAR-21.

Subpart F, “Production of Air Systems and Airborne Stores”, DDPMAS, IMTAR-21

Who can indigenize aircraft spares?

Sec. 21.K.2 of Subpart K, IMTAR-21

Indigenous substitution can be taken up by any agency i.e, Public Sector, Private Sector,

Government Agencies or the organisations within the User Services such as BRDs, NAYs,

Army Base Workshops etc., henceforth referred to as the Indigenization Agencies. (Refer

Chapter 12, Part 2 of the Framework document)

21.K.2 Indigenisation Agency

The Main Contractor, who initiates the indigenisation process shall be considered as the

Indigenisation Agency.

a) Indigenous substitution can be taken up by any agency i.e. Public Sector, Private

Sector, Government Agencies or the Organisations within the User Services

responsible for indigenisation activities such as BRDs, NAYs, Army Base Workshops

etc., hereinafter referred as the Indigenisation Agency.

b) The Indigenisation Agency shall identify the stores which are to indigenized and finalize

the methodology for indigenisation

c) For taking up indigenisation of critical Airborne Stores, the Indigenisation Agency shall

follow the Design Approved Organisation Scheme given in the DDPMAS document and

the associated regulations given in Subpart G1. Indigenisation Agencies (IA) must have

a defined internal Quality Control Process.

d) In cases where the indigenisation of stores is done by vendors identified by the

Indigenisation Agency, the Indigenisation Agency shall ensure that the vendors are

capable of carrying out such activities.

What are the responsibilities of an Indigenisation agency?


21.K.3 Responsibilities of Indigenisation Agency

The Indigenisation Agency shall be responsible for design, development and production of the

indigenized Airborne Stores. In case, some of these activities are achieved by way of sub-

contracting to suitable vendors, the Indigenisation Agency shall ensure that the vendors

comply with the airworthiness certification requirements.


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a) The Indigenisation Agency shall handle all the issues related to the Intellectual Property

Rights (IPR).

b) The Indigenisation agency shall ensure that, wherever specific requirements in the form

of Specifications/ Qualitative Requirements/ Service Requirements for the Airborne

Store to be indigenized have been issued by the User Services, the same are taken into

consideration.

c) The Indigenisation Agency shall ensure the availability of necessary test facilities at all

the applicable levels at which testing is envisaged.

d) The Indigenisation Agency shall identify the Authorized Holder of Sealed Particulars

(AHSP) for the Airborne Store.

e) List of Indigenised items may be provided to TAA at regular periodicity.

What is Local Type Certification Committee (LTCC)?


21.K.4 Local Type Certification Committee (LTCC)

A Local Type Certification Committee (LTCC) shall be constituted to classify the criticality of

the Airborne Store and clear the technical aspects of indigenous substitution.

a) LTCC shall be constituted by CEMILAC for the Indigenisation Agency with relevant

stakeholders and it shall assess & classify the Airborne Stores to be indigenously

substituted based on their criticality as „critical‟ and „non-critical‟.

b) Upon consideration, LTCC shall refer the critical Airborne Stores to CEMILAC for

clearance. Non-critical Airborne Stores shall be cleared by LTCC itself.

c) The composition of LTCC shall be as follows:

Chairman: CEMILAC Representative

Members:

Head of Indigenisation, Indigenisation Agency (IA)

Representative of the Design Department of Indigenisation Agency

Head of Quality Department of Indigenisation Agency

Domain Expert to be nominated by CEMILAC

DGAQA Representative (or reps of QA nominated by User Services)

User Representative

Member Secretary: QA Rep of Indigenisation Agency

What is criticality classification and what are critical and non-critical airborne stores?


21.K.5 Criticality Classification of Airborne Stores by LTCC

LTCC shall classify the criticality of the Airborne Store. LTCC is empowered to classify

Airborne Stores as Critical and Non-Critical.


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Critical: Airborne store, whose malfunctioning may affect safety, reliability,

maintenance, interchangeability and operational effectiveness is called as a Critical

Airborne Store.

Non-Critical: All other Airborne stores, which are not classified as critical, is treated as

non-critical.

How are critical and noncritical stores cleared with airworthiness certification?


21.K.6 Airworthiness Certification Approach

The approach to airworthiness certification including the extent of testing would depend on the

criticality of the Airborne Store.

a) The Airborne Stores, identified as critical by the LTCC, shall follow the activities leading

to clearance of the store as per Subpart C, with QA coverage by DGAQA/QA agency of

the User Services.

b) The Airborne Stores, identified as non-critical by the LTCC, the airworthiness

certification coverage shall be as follows:

The indigenisation agency shall put up the detailed plan for indigenisation

including technical specification, development and test plan to the LTCC for

review and ratification.

On completion of the activities, the indigenisation agency shall submit the test

reports and compliance to LTCC for clearance.

How are Tools, Testers and Ground Equipment (TTGE) andits spares approved?

Para 1.4.14, page 27 of Framework document, Part 2 - Chapter 1 Ab-initio Design,

Development, Production and Certification of Air Systems & Airborne Stores

Tools, Testers & Ground Equipment (TTGE) are those equipments which are used by the

ground/aircraft carrier/ air crew for preparation, service, upkeep and maintenance of Air

System / Airborne Store during their operational use. The technical specifications of the TTGE

which are to be delivered to the Users shall be approved by CEMILAC and TTGE shall be

certified by DGAQA. Maintenance Organisations of User Services shall be involved during the

development.

For the indigenous substitution of non-critical Airborne Stores and development of TTGEs by

the User Services organisations, the respective service HQ may designate appropriate

authorities within these organisations who can provide the necessary coverage including

clearance based on the criticality classification by LTCC. The clearance by the competent

authority within the Services shall be treated as final.


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What is the approach for development and prototyping of noncritical stores?


21.K.7 Development and Prototyping of Non-critical Airborne Stores

Development of Airborne Store shall be carried out as per identified Systems Engineering

Process leading to finalization of Standard of Preparation (SOP) and fabrication of prototypes.

a) Technical specifications for the Airborne Store shall be prepared by the Indigenisation

Agency.

b) For the cases where no technical details are available, the technical specifications shall

be approved by the indigenisation authority of the Indigenisation Agency.

c) The Indigenisation Agency shall establish appropriate processes for Configuration

Control and Defect Investigation during all the phases.

What is the approach for testing and evaluation of airborne stores?


21.K.8 Test and Evaluation Phase

The Airborne store under indigenous substitution shall be subjected to necessary test and

evaluation prior to its clearance.

a) Functional and Performance Testing: Adequate functional and perforce testing for the

Airborne Stores shall be carried out at appropriate levels using testers/simulators and

rigs, as applicable.

b) Qualification Testing: Qualification test plan shall be proposed by the designer of the

Airborne Store in accordance with the technical specification of the Airborne Store. If the

qualification testing details of the Airborne Store to be indigenously substituted are

available from its OEM, the same can be used as the basis.

c) The qualification test plan shall be approved by the indigenisation authority of the


d) Qualification tests shall be carried out at NABL/ Govt. approved test

houses/Laboratories as far as possible.

e) Qualification tests shall be witnessed by the internal quality assurance group of the

Indigenisation Agency. Qualification test results from these test houses/ laboratories

shall be coordinated by relevant QA authority for their acceptance for issuance of

clearance.

f) Flight Testing: In regard to Airborne Stores where flight tests are required for their

evaluation, views of the end Users/flight test agency shall be taken into consideration

before finalizing the flight test specification. Flight Test specification shall be prepared

by the Indigenisation Agency.

Who issues airworthiness clearance to critical and noncritical stores?

Chapter 12 Part 1 of Framework and Sec. 21.K.9 of Subpart K, IMTAR-21


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Airborne store shall be issued with the necessary clearances prior to its integration

on Air Systems.

a) Airworthiness clearance for the non-critical Airborne Stores shall be issued by the LTCC

through the Minutes of the Meeting (MoM).

b) The clearance for critical Airborne Stores shall be issued by CEMILAC as per Subpart C

of IMTAR.

Who can undertake production of noncritical airborne stores?

Sec. 21.K.10 of Subpart K

Subpart F, IMTAR-21

21.K.10. Production of Non-Critical Airborne Stores for Indigenous Substitution

The Indigenisation Agency shall produce the Airborne Store as per the Standard of

Preparation released as a part of clearance process.

a) Production of the Airborne Store shall be progressed as per Subpart F of IMTAR.

b) Quality Assurance aspects during production shall be ensured by the identified QA

authority.

c) Periodic Quality Test (PQT)/ Acceptance Tests: The Indigenisation Agency shall

conduct the necessary tests (PQT & AT) on the Airborne Store produced as per the

schedule mutually agreed with relevant stakeholders.

d) Production Deviations: Deviations in the production shall be addressed through a Non-

Conformance Review Process (NCRP).

e) Modifications: Modifications to the approved SOP shall be handled through a

Configuration Control Process (CCP) with relevant stakeholders by the Indigenisation

Agency. Procedure for modifications during production and in-service phase shall be as

given in Subpart E/Subpart L with the involvement of the indigenisation authority of the


Under what conditions is the airworthiness clearance liable for withdrawal?


21.K.11 Withdrawal of Airworthiness Clearance

Indigenised Airborne Stores if found to be unsatisfactory, the clearances shall be

withdrawn by LTCC. If the conditions of clearance of the indigenously substituted Airborne

Stores are not satisfied or the field performance as per the feedback provided by Users is not

satisfactory, the clearance issued earlier may be withdrawn by LTCC after due deliberation.

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